<!--
 * @Author: scl
 * @Date: 2023-02-21 10:46:33
 * @LastEditTime: 2023-02-21 23:21:30
 * @Description: file content
-->
<template>
  <div class="swiper-container" ref="cur">
    <div class="swiper-wrapper">
      <div class="swiper-slide" v-for="img,index in skuImgList" :key="img.id">
        <img :src="img.imgUrl" :class="{active:currentIndex==index}" @click="changeCurrentIndex(index)">
      </div>
    </div>
    <div class="swiper-button-next"></div>
    <div class="swiper-button-prev"></div>
  </div>
</template>

<script>

import Swiper from 'swiper'
export default {
  name: "ImageList",
  props: ['skuImgList'],
  data(){return{
    currentIndex:0
  }
  },
  methods:{
    changeCurrentIndex(index){
      this.currentIndex=index,
      // 通知兄弟组件当前索引值为几
      this.$bus.$emit('getIndex',this.currentIndex)
    }
  },
  watch: {
    // 监听数据：可以保证数据一定OK，但不能保证从v-for遍历结构是否完成
    skuImgList(newValue, oldValue) {
      this.$nextTick(() => {
          new Swiper(this.$refs.cur, {
          // 如果需要前进后退按钮
          navigation: {
            nextEl: '.swiper-button-next',
            prevEl: '.swiper-button-prev',
          },

          // 如果需要滚动条
          scrollbar: {
            el: '.swiper-scrollbar',
          },
          //显示几个图片设置
          slidesPerView:3,
          //每一次切换图片个数
          slidesPerGroup:1
        });
      });
    },
  }
}
</script>

<style lang="less" scoped>
.swiper-container {
  height: 56px;
  width: 412px;
  box-sizing: border-box;
  padding: 0 12px;

  .swiper-slide {
    width: 56px;
    height: 56px;

    img {
      width: 100%;
      height: 100%;
      border: 1px solid #ccc;
      padding: 2px;
      width: 50px;
      height: 50px;
      display: block;

      &.active {
        border: 2px solid #f60;
        padding: 1px;
      }
    }
  }

  .swiper-button-next {
    left: auto;
    right: 0;
  }

  .swiper-button-prev {
    left: 0;
    right: auto;
  }

  .swiper-button-next,
  .swiper-button-prev {
    box-sizing: border-box;
    width: 12px;
    height: 56px;
    background: rgb(235, 235, 235);
    border: 1px solid rgb(204, 204, 204);
    top: 0;
    margin-top: 0;

    &::after {
      font-size: 12px;
    }
  }
}
</style>